opponents of egypt's newly elected president is going to pull back of his decrees issued last friday. nbc's ayman mulhedian has the report. >> reporter: tens of thousands of egyptians are expected to pour into the tahrir square on thursday demanding president morsi rescind a decree that gave him sweeping new powers, particularly the ability to legislate without any judicial review. outside the u.s. embassy, r rioters clashed. now president morsi has defended his decision saying he had to take the measure because of judicial interference. he said the egypt judicial is full of remnants of the old regime and not allowing him to get anything done in the country. organizations have been concerned that morsi and his muslim brotherhood are trying to usurp power in the country. it has left hundreds of people injured and a few deaths. officials in cairo are concerned about growing confrontations. arriva reporting for nbc news, cairo. >>> meantime in the west bank, scientists are studying the remains of yasser arafat. looking for more clues on the actual cause of his death. arafat died in 2004